There is a bar chart report where its shows me average line by default(reference line). I have 4 different fields and when i click on one particular field it gives me a bar representation in the second report for all the months available with this an average line is also shown for all these months. In the below image 1 the average for all the data is around 8.5%. data is shown from july 2016 to till date.

But the issue is when we select particular months, for an example i select nov 16 to feb 17 it still displays an average line which shows right value. But when I try to export it as PDF or image then it returns me the first image whereas I need to see the second one as we are selecting particular months of data only.